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M6.6 earthquake, Kermadec Islands, 1990-03-21

MagnitudeM6.6mw

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Depth145 km

Time (UTC)1990-03-21 16:46

Rank in 199031 / 153among M6+

Rank since 19003527 / 14,458

Energy vs an M6×8approx.

Kermadec Islands region · -31.09, -179.09

M6.5+ within 300 km (largest first)

1917 M8.2M8.2

2021 M8.1M8.1

1917 M7.5M7.5

2006 M7.4M7.4

2020 M7.4M7.4

2021 M7.4M7.4

1968 M7.3M7.3

2019 M7.3M7.3

1963 M7.3M7.3

1978 M7.2M7.2

1995 M7.2M7.2

2001 M7.2M7.2

Earlier M6+ within 300 km

Event	Time (UTC)	Depth	Place
M6.0 1990-01-18	1990-01-18 12:45	13 km	Kermadec Islands, New Zealand
M6.1 1990-01-14	1990-01-14 21:04	58 km	Kermadec Islands, New Zealand
M6.3 1989-05-20	1989-05-20 16:01	29 km	Kermadec Islands, New Zealand
M7.0 1989-05-14	1989-05-14 00:59	44 km	Kermadec Islands, New Zealand
M6.0 1989-03-16	1989-03-16 09:33	37 km	Kermadec Islands, New Zealand
M6.8 1989-02-25	1989-02-25 11:26	30 km	Kermadec Islands, New Zealand
M6.4 1988-12-16	1988-12-16 09:57	31 km	Kermadec Islands, New Zealand
M6.6 1988-01-12	1988-01-12 07:29	15 km	Kermadec Islands region
M6.6 1987-09-07	1987-09-07 11:57	33 km	Kermadec Islands region
M6.8 1987-02-17	1987-02-17 06:16	10 km	south of the Kermadec Islands

Energy ratio uses the rule that one magnitude unit is about 32 times the energy. Magnitudes and locations are USGS values and can differ from national agencies. Older records are less complete and less precise.